That is to say, the schedule is full, but there is no time at all! Mainly refers to university courses.

Every semester's curriculum is different, sometimes there are classes and sometimes there are no classes. There are four major classes for one more day, and there may be no classes at all for one less day. When there is no class every day, you can go to the library or take classes in other majors you are interested in, or you can stay in the dormitory and do what you want. College is not easy, but it gives you a lot of time to arrange yourself.

If you don't like studying and want to stay in the dormitory and play games every day, the whole class is really a disaster and really painful. On the contrary, if you want to enrich yourself through study, you can learn a lot and enrich yourself well.